Thanks for the mod and for providing a wood dump.
Once you got to solar/nuclear, there's little use for Rosin Resin either, while wood still piles up when you expand your factory.
What about using resin or rosin resin in some way to make it end up in solid fuel? That way you could still consume wood in the end game.
Possible ideas for recipes (all in chemical plants):
- 9 solid fuel + 2 rosin resin => 10 solid fuel
- 90 light oil + 4 resin => 10 solid fuel
- 2 rosin resin => 1 solid fuel
I think one additional recipe should be enough, and it think it should be a net loss regarding burn value. As you still turn wood into something useful, it should still feel good to do so, but you shouldn't feel like missing out if you are out of wood.